Women's Bottom Turn Racerback Bikini Top vs Women's Rossi Halter Underwire Top: which is safer?
Patagonia Women's Bottom Turn Racerback Bikini Top is the clear pick. Vitamin A Women's Rossi Halter Underwire Top carries a failing PFAS grade, and we never recommend buying a failing product.
Our pick
Patagonia
Women's Bottom Turn Racerback Bikini Top
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleElastane (spandex) degradation under heat or chlorine
Vitamin A
Women's Rossi Halter Underwire Top
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleNickel leaching from underwire
ReportedSpandex degradation and microfiber shedding
PossibleAzo dyes or heavy metals in colorants
Where these two actually differ
- We flag Elastane (spandex) degradation under heat or chlorine on the Patagonia and not on the Vitamin A.
- We flag Nickel leaching from underwire, Spandex degradation and microfiber shedding, Azo dyes or heavy metals in colorants and Elastic/seam adhesive degradation on the Vitamin A and not on the Patagonia.
- The Patagonia is Nylon/polyester blend with elastane (standard swimwear) where the Vitamin A is nylon/spandex blend with underwire support, which is most of the difference in these two grades.
- The gap is 25 points, wide enough that this is not a close call, and the Patagonia is the one to buy.
Both products run through the same public rubric: materials, coatings, brand disclosure, lab findings, and recalls, plus a beyond-PFAS hazard analysis. Grades are model-based estimates, not lab tests. How grades work →
More swimwear: see the full ranking